Brake release



y 19, 1932- R. s PEARSON ET AL- 1,863,251

BRAKE RELEASE I Filed July 28, 1951 2 Sheets-Sheet l I nvenlor J flfearao/y 7T3. .Pea/

July 19, 1932. R. s. PEARSON ET AL 1,868,251

BRAKE RELEASE Filed July 28, 1931 2 Sheets-Sheet 2 Z I v a.

TILE-"157 7Q //9 Inventors /7 [L 4 Y 5 6451 1 g ji ardo/p r H Z 66/ 0 i J 4 @mm&

Patented July 19, 1932 UNITED STATES ROBERT s. rEAnsoNANn .TnssE B. rust. or tocxron'nnnw YORK R izEREL ASE Application filed July 28, 1931. Serial No. 553,614.

This invention relates to new and useful improvements in brake appliances, and more particularly to brakes for automobiles and like vehicles.

The principal object of the invention is to provide a brake appliance adapted to prevent a car when stopped on a grade, from travelling backwards or forwards without the use of the ordinary footbrake besides the possible stalling of the motor when attempt- I ing to start from a standstill on a grade.

Another important object of the invention is to provide an automatic release for emergency brakes operative by the usual clutch control. 7

Other important objects and advantages of the invention will become apparent to the reader 'of the following specification.

In the drawings: 1

Figure 1 represents a side elevational view of a transmission showing the appliance associated with a handbrake.

Figure 2 represents a side elevational view of the novel pawl.-

Figure 8 represents a front elevational view of the pawl.

Figure 4 represents a longitudinal sectional view taken substantially online 44 of Figure 5.

Figure 5 represents a top plan view of the brake lever yoke.

Figure 6 represents a longitudinal sectional View through the pneumatic cushioning cylinder.

Figure 7 represents a side elevational view of the cam for the clutch shaft.

Figure 8 represents a longitudinal sectional view through the turnbuckle.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5' generally refers to the usual gear transmission while numeral 6 generally refers to the usual clutch housing through which the usual clutch shaft 7 which is operated by the usual clutch pedal (not shown) extends.

On the side of the transmission adjacent the hand brake lever 8, an outwardly taper ing cam 9 is provided on the shaft 7 of the clutch. N umeral 10 represents the fulcrum support for'the lever 8 and a dependingportion 11 thereof projects downwardly into the rectangular shaped frame 12, which has a roller 18 mounted therein adjacentitsfon ward end, and against which the lower .por- 7 tion 11 of the brake lever operates.

{Numeral l4'represents a connecting rod, which extends from the rear end ofrthe frame 12, through the cushioning cylinder 15 to connect to the brakes of the vehicle (not shown). The bored end of'the' cylinder 15 is closed ings 16, while its opposite end is provided with-a removable closure 17.

Suitably secured-to the rod 14 is a piston ton 18 has a by-passopening 19 therein iuder can pass during the motion of the piswhich is provided with anlarm 22 constructe excepting for the small open- 1- OFFICE.

18 operative in the cylinder 15 and thispisthrough which the air content of the cylied to-ln'ovidea guide 23forthe aforemen tioned rod14.- This bracket 21 is also pro vided with straps 24= for clamping engage' I me-nt with the aforementioned cylinder 15. The rod 14 may be in sections and between these sections, the turnbuckle 25 can-be in- V stalled. 'fNumeral 26 represents a block supported on onesi-de of the transmissioncas ing and rockably supported on the pin'27 projecting from this'block 26 is the pawl generallyv referred to by numeral 28. It will-also be observedatthis 'point that the forward end of the frame 12 is provided with an. extension 29 which can be disposed through an opening in 'theblock 26 so-asfto guide the forward portionof the frame; r

. Asis clearlyshown in Figures 2 and 3,.the

pawl includes an arcuated shaped bar 30 provided with 'a'hooked-head 31 at upper end and an opening at: its intermediate portion denoted: by numeral '33 for receiving the aforementioned pin 27. The lower'endof this bar 30 is provided with a reduced ex tension 33 for disposition normally against the-reduced extension 84 onthe mobile head 35, the same beingpivotally connectediat its extremity as at 36; to the bar inner endof the extension :33.

coiled spring 37 is provided for nor- 30 at the.

cam- 9" in the direction of the arrow,

' headj35, which results in pawl j28 and the releasing of the hook 31 tromat-heteeth 89 of the frame 12. p

theubra'ke is released simultaneously with the engagement of the clutch.

' shape,- size, and "materials mally maintaining the head 35 and bar in V alineinent. A spring 38 is interposed between the bar 30 and the block 26 (see Fig ure 1) for normally maintaining the forward end of the bar 30 urged upwardly so that the hook end 31 will be in a position to engage the teeth 39 on the'forward end of the frame l2." v i 1 It will now be seen that when the brake lever 8 is pulled backwardly, a pull will be; exerted on-therod 14 so that the forward end of the frame'12 will be urged under the hook 31 of the pawl 28. The usual clutch edal is now forced inwardly so as torelease the clutch while the gears are being shifted.

Obviously in the upward motion of tlfie t ev head= of the pawl. will be free to swing upwardly to vpermit the cam to pass by the pawl. iHowever, when the clutch pedal is released, the'ishaft 7 carries the lug down- 7 ward'ly in the oposite. direction against the V Thus,

. a While the foregoingspecification.sets forth the invention in specific terms, it is to be understood that numerous changes in the may be resorted to. without departingfrom the spirit and scopeofthe invention as: claimed hereinafter;

HWe-Claim;

I a rod operated-by thehand-lever, teeth onthe the teeth on the rod. 1

rod, and arockabl'e pawl swin'gable by the cam and being adapted tor; engagement with the teeth "on the "rod, said rode being provided with a rectangu lar shaped frame through which the handlerakeextends, andirramti-friction means inthe frameforengagementwith the-lever... 1

-4rll'Incombination, :a handbrake lever, a

clutch control including a cam, a connecting V 7 rod operated by the handlever, teeth on the rod, and-"arocka'ble pawl swingabl'e by the 5 lug and being adapted for engagement with the teeth on the rod, said. pawl being conthe connecting rod.

In testimony whereof we affix our signa- 7 structed in a pair of separably connected sections, one section being engageable with the teeth and the other section beingengageable by the cam.

5. In combination, a handbrake-lever, a

clutch control including a cam, a connecting rod operated by the handlever, teeth on the rod, and arockable pawl iswinga ble by the I cam and being adapted for engagement with retarding means in thetceth on the rod, and

tures. I

ROBERT s. PEARSON. JESSE B. PEEL.

the rocking of the I V I ,7 1. In combination, ZaP handb-rake: lever,ja v. V 1 clutch control including a cam, a connecting 

